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Batuhan Osman TASKAYA
cpython
Commits
c71585e0
Kaydet (Commit)
c71585e0
authored
Mar 12, 1998
tarafından
Fred Drake
Dosyalara gözat
Seçenekler
Dosyalara Gözat
İndir
Eposta Yamaları
Sade Fark
Logical markup.
Markup consistency. Removed incorrect \setindexsubitem{}.
üst
38d3fe01
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libfcntl.tex
Doc/lib/libfcntl.tex
+31
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libfcntl.tex
Doc/libfcntl.tex
+31
-30
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Doc/lib/libfcntl.tex
Dosyayı görüntüle @
c71585e0
...
...
@@ -6,54 +6,55 @@
\indexii
{
UNIX@
\UNIX
{}}{
I/O control
}
This module performs file control and I/O control on file descriptors.
It is an interface to the
\
dfn
{
fcntl()
}
and
\dfn
{
ioctl()
}
\UNIX
{}
routines.
File descriptors can be obtained with the
\dfn
{
fileno()
}
method of a
file or socket object.
It is an interface to the
\
cfunction
{
fcntl()
}
and
\cfunction
{
ioctl()
}
\UNIX
{}
routines. File descriptors can be obtained with the
\method
{
fileno()
}
method of a
file or socket object.
The module defines the following functions:
\setindexsubitem
{
(in module struct)
}
\begin{funcdesc}
{
fcntl
}{
fd
\,
op
\optional
{
\
,
arg
}}
Perform the requested operation on file descriptor
\
code
{
\var
{
fd
}
}
.
The operation is defined by
\
code
{
\var
{
op
}
}
and is operating system
\begin{funcdesc}
{
fcntl
}{
fd
, op
\optional
{
, arg
}}
Perform the requested operation on file descriptor
\
var
{
fd
}
.
The operation is defined by
\
var
{
op
}
and is operating system
dependent. Typically these codes can be retrieved from the library
module
\
code
{
FCNTL
}
. The argument
\code
{
\var
{
arg
}
}
is optional, and
module
\
module
{
FCNTL
}
. The argument
\var
{
arg
}
is optional, and
defaults to the integer value
\code
{
0
}
. When
it is present, it can either be an integer value, or a string. With
the argument missing or an integer value, the return value of this
function is the integer return value of the
real
\code
{
fcntl()
}
function is the integer return value of the
\C
{}
\cfunction
{
fcntl()
}
call. When the argument is a string it represents a binary
structure, e.g.
\
created by
\code
{
struct.pack()
}
. The binary data is
copied to a buffer whose address is passed to the real
\code
{
fcntl()
}
call. The return value after a successful call is the contents of
the buffer, converted to a string object. In case the
\code
{
fcntl()
}
fails, an
\code
{
IOError
}
will be raised.
structure, e.g.
\
created by
\function
{
struct.pack()
}
. The binary
data is copied to a buffer whose address is passed to the
\C
{}
\cfunction
{
fcntl()
}
call. The return value after a successful call
is the contents of the buffer, converted to a string object. In
case the
\cfunction
{
fcntl()
}
fails, an
\exception
{
IOError
}
is
raised.
\end{funcdesc}
\begin{funcdesc}
{
ioctl
}{
fd
\,
op
\
,
arg
}
This function is identical to the
\
code
{
fcntl()
}
function, except
\begin{funcdesc}
{
ioctl
}{
fd
, op
, arg
}
This function is identical to the
\
function
{
fcntl()
}
function, except
that the operations are typically defined in the library module
\
cod
e
{
IOCTL
}
.
\
modul
e
{
IOCTL
}
.
\end{funcdesc}
\begin{funcdesc}
{
flock
}{
fd
\
,
op
}
\begin{funcdesc}
{
flock
}{
fd, op
}
Perform the lock operation
\var
{
op
}
on file descriptor
\var
{
fd
}
.
See the
\UNIX
{}
manual for details. (On some systems, this function is
emulated using
\
code
{
fcntl()
}
.)
emulated using
\
function
{
fcntl()
}
.)
\end{funcdesc}
\begin{funcdesc}
{
lockf
}{
fd
\,
code
\,
\optional
{
len
\,
\optional
{
start
\,
\optional
{
whence
}}}}
This is a wrapper around the
\code
{
F
_
SETLK
}
and
\code
{
F
_
SETLKW
}
\code
{
fcntl()
}
calls. See the
\UNIX
{}
manual for details.
\begin{funcdesc}
{
lockf
}{
fd, code,
\optional
{
len,
\optional
{
start,
\optional
{
whence
}}}}
This is a wrapper around the
\constant
{
FCNTL.F
_
SETLK
}
and
\constant
{
FCNTL.F
_
SETLKW
}
\function
{
fcntl()
}
calls. See the
\UNIX
{}
manual for details.
\end{funcdesc}
If the library modules
\
code
{
FCNTL
}
or
\code
{
IOCTL
}
are missing, you
can find the opcodes in the C include files
\file
{
sys/fcntl.h
}
and
\file
{
sys/ioctl.h
}
. You can create the modules yourself with the h2py
script, found in the
\file
{
Tools/scripts
}
directory.
\
refstmodindex
{
FCNTL
}
\refstmodindex
{
IOCTL
}
If the library modules
\
module
{
FCNTL
}
\refstmodindex
{
FCNTL
}
or
\module
{
IOCTL
}
\refstmodindex
{
IOCTL
}
are missing, you can find the
opcodes in the
\C
{}
include files
\code
{
<sys/fcntl.h>
}
and
\code
{
<sys/ioctl.h>
}
. You can create the modules yourself with the
\
program
{
h2py
}
script, found in the
\file
{
Tools/scripts/
}
directory.
Examples (all on a SVR4 compliant system):
...
...
@@ -66,9 +67,9 @@ rv = fcntl(file.fileno(), FCNTL.O_NDELAY, 1)
lockdata = struct.pack('hhllhh', FCNTL.F
_
WRLCK, 0, 0, 0, 0, 0)
rv = fcntl(file.fileno(), FCNTL.F
_
SETLKW, lockdata)
\end{verbatim}
%
Note that in the first example the return value variable
\code
{
rv
}
will
hold an integer value; in the second example it will hold a string
value. The structure lay-out for the
\var
{
lockadata
}
variable is
system dependent --
therefore using the
\code
{
flock()
}
call may be
system dependent --
- therefore using the
\function
{
flock()
}
call may be
better.
Doc/libfcntl.tex
Dosyayı görüntüle @
c71585e0
...
...
@@ -6,54 +6,55 @@
\indexii
{
UNIX@
\UNIX
{}}{
I/O control
}
This module performs file control and I/O control on file descriptors.
It is an interface to the
\
dfn
{
fcntl()
}
and
\dfn
{
ioctl()
}
\UNIX
{}
routines.
File descriptors can be obtained with the
\dfn
{
fileno()
}
method of a
file or socket object.
It is an interface to the
\
cfunction
{
fcntl()
}
and
\cfunction
{
ioctl()
}
\UNIX
{}
routines. File descriptors can be obtained with the
\method
{
fileno()
}
method of a
file or socket object.
The module defines the following functions:
\setindexsubitem
{
(in module struct)
}
\begin{funcdesc}
{
fcntl
}{
fd
\,
op
\optional
{
\
,
arg
}}
Perform the requested operation on file descriptor
\
code
{
\var
{
fd
}
}
.
The operation is defined by
\
code
{
\var
{
op
}
}
and is operating system
\begin{funcdesc}
{
fcntl
}{
fd
, op
\optional
{
, arg
}}
Perform the requested operation on file descriptor
\
var
{
fd
}
.
The operation is defined by
\
var
{
op
}
and is operating system
dependent. Typically these codes can be retrieved from the library
module
\
code
{
FCNTL
}
. The argument
\code
{
\var
{
arg
}
}
is optional, and
module
\
module
{
FCNTL
}
. The argument
\var
{
arg
}
is optional, and
defaults to the integer value
\code
{
0
}
. When
it is present, it can either be an integer value, or a string. With
the argument missing or an integer value, the return value of this
function is the integer return value of the
real
\code
{
fcntl()
}
function is the integer return value of the
\C
{}
\cfunction
{
fcntl()
}
call. When the argument is a string it represents a binary
structure, e.g.
\
created by
\code
{
struct.pack()
}
. The binary data is
copied to a buffer whose address is passed to the real
\code
{
fcntl()
}
call. The return value after a successful call is the contents of
the buffer, converted to a string object. In case the
\code
{
fcntl()
}
fails, an
\code
{
IOError
}
will be raised.
structure, e.g.
\
created by
\function
{
struct.pack()
}
. The binary
data is copied to a buffer whose address is passed to the
\C
{}
\cfunction
{
fcntl()
}
call. The return value after a successful call
is the contents of the buffer, converted to a string object. In
case the
\cfunction
{
fcntl()
}
fails, an
\exception
{
IOError
}
is
raised.
\end{funcdesc}
\begin{funcdesc}
{
ioctl
}{
fd
\,
op
\
,
arg
}
This function is identical to the
\
code
{
fcntl()
}
function, except
\begin{funcdesc}
{
ioctl
}{
fd
, op
, arg
}
This function is identical to the
\
function
{
fcntl()
}
function, except
that the operations are typically defined in the library module
\
cod
e
{
IOCTL
}
.
\
modul
e
{
IOCTL
}
.
\end{funcdesc}
\begin{funcdesc}
{
flock
}{
fd
\
,
op
}
\begin{funcdesc}
{
flock
}{
fd, op
}
Perform the lock operation
\var
{
op
}
on file descriptor
\var
{
fd
}
.
See the
\UNIX
{}
manual for details. (On some systems, this function is
emulated using
\
code
{
fcntl()
}
.)
emulated using
\
function
{
fcntl()
}
.)
\end{funcdesc}
\begin{funcdesc}
{
lockf
}{
fd
\,
code
\,
\optional
{
len
\,
\optional
{
start
\,
\optional
{
whence
}}}}
This is a wrapper around the
\code
{
F
_
SETLK
}
and
\code
{
F
_
SETLKW
}
\code
{
fcntl()
}
calls. See the
\UNIX
{}
manual for details.
\begin{funcdesc}
{
lockf
}{
fd, code,
\optional
{
len,
\optional
{
start,
\optional
{
whence
}}}}
This is a wrapper around the
\constant
{
FCNTL.F
_
SETLK
}
and
\constant
{
FCNTL.F
_
SETLKW
}
\function
{
fcntl()
}
calls. See the
\UNIX
{}
manual for details.
\end{funcdesc}
If the library modules
\
code
{
FCNTL
}
or
\code
{
IOCTL
}
are missing, you
can find the opcodes in the C include files
\file
{
sys/fcntl.h
}
and
\file
{
sys/ioctl.h
}
. You can create the modules yourself with the h2py
script, found in the
\file
{
Tools/scripts
}
directory.
\
refstmodindex
{
FCNTL
}
\refstmodindex
{
IOCTL
}
If the library modules
\
module
{
FCNTL
}
\refstmodindex
{
FCNTL
}
or
\module
{
IOCTL
}
\refstmodindex
{
IOCTL
}
are missing, you can find the
opcodes in the
\C
{}
include files
\code
{
<sys/fcntl.h>
}
and
\code
{
<sys/ioctl.h>
}
. You can create the modules yourself with the
\
program
{
h2py
}
script, found in the
\file
{
Tools/scripts/
}
directory.
Examples (all on a SVR4 compliant system):
...
...
@@ -66,9 +67,9 @@ rv = fcntl(file.fileno(), FCNTL.O_NDELAY, 1)
lockdata = struct.pack('hhllhh', FCNTL.F
_
WRLCK, 0, 0, 0, 0, 0)
rv = fcntl(file.fileno(), FCNTL.F
_
SETLKW, lockdata)
\end{verbatim}
%
Note that in the first example the return value variable
\code
{
rv
}
will
hold an integer value; in the second example it will hold a string
value. The structure lay-out for the
\var
{
lockadata
}
variable is
system dependent --
therefore using the
\code
{
flock()
}
call may be
system dependent --
- therefore using the
\function
{
flock()
}
call may be
better.
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